Vaporizer



l. E. ASKE VAPORIZER May 13, 1930.

Filed April 15, 1929 R O T N E V m Patented May 13, 1930 UNITED STATES IRVING E. ASKE, F MINNEAPOLIS, MINNESOTA VAPORIZER Application filed April 15,

My invention relates to vaporizers and has for its object the improvement of electric vaporizers for converting hydrocarbon fuel into hot fumes for use in starting a cold internal explosion engine, and for such other or further uses as it may be adapted to serve. It consists of the structures, combinations and arrangements of parts hereinafter described and claimed.

In the drawings, Fig. l is a central vertical section of my said invention. Fig. 2 is a horizontal section of the same approximately on the line A-B of Fig. l. Fig. 3 is a vertical section of said invention approximately on the line C-D of Fig. 2. Fig. 4 is a side elevation of a heat insulation sheath forming part of my said invention. Fig. 5 is a front elevation of any one of the hereinafter described -intermediate pads. Fig. 6 is a side elevation of the same. Fig. 7 is a front elevation of either of the hereinafter described center pads. Fig. 8 is a side elevation of the same. Fig. 9 is a front elevation of either of the hereinafter described outer pads. Fig. l0 is a grooved side elevation of the same, and Fig. 11 is a side elevation of a hereinafter described protective shell.

In the drawings, l is a vaporiaer cup adapted to be cast upon or by any suitable 2n means, as by ears l, secured to the air-intake horn. or intake manifold of an internal explosion engine, or other fuel conductor (not shown) which it may serve, and to discharge thereinto. Said cup is closed at the bottom by a plug 2, through which extends a binding post 3 electrically insulated from said plug in any suitable manner, or by any suitable means, as by intervening washers 3 of insulating material. Electrically connected at one end to the head of said post within a recess 2 in said plug, are resista-nce members t and 5 which at their opposite ends are grounded on said cup in any suitable manner and by any suitable means.

The assembly of said cup, plug and resistance mea-ns is not now broadly new, but for reasons hereinafter set forth the head of the binding post or terminal screw 3 preferably has an open horizontal slot formed therein.

Extending into the recess in said plug is a 1929. Serial No. 355,361.

cylindrical heat insulating sheath 6 of any suitable heat insulating material as mica, and a concentric cylindrical protective shell 7, preferably of metal.

Heretofore, a single thick absorbent pad extending' diametrically across the bore of said shell, or of said sheath, has been positioncd between such resistance members, filling the space between said members, and single thick absorbent pads extending across the bore of said shell or of said sheath and parallel with said central pad have been positioned against the outer sides of said resistance members, respectively, for the purpose of absorbing fuel oil to be converted into vapor or fumes. But heretofore the flow of oil in and through said pads has not been sutiiciently rapid when the resistance members were subjected to current at five volts and the units tended to burn out when the voltage was maintained at tive volts carrying eighty amperes for more than a minute, even when the vaporizer cup was well supplied with fuel oil. In such case it seemed that the flow of oil was retarded by back pressure of the gases rapidly generated from part of the oil by the heating members, or that the flow of oil by capillary attraction, or otherwise, was not fast enough to absorb the excess heat at tive volts carrying eighty amperes and to relatively cool the resistance members. On the other hand, it is necessary to avoid chilling the resistance members by an nnimpeded flow of oil when the voltage is materially reduced.

One object of my invention is, therefore, to increase the amount of fuel oil vaporized per second, without chilling the resistance members below a point of high efficiency, and to reduce or eliminate the tendency of the resistance members to burn out at five volts, carrying eighty amperes.

To effect this purpose, I position at each side of each of the resist-ance members a very thin absorbent member, as 8, 9, l0, ll, respectively, each preferably one-thirty second of an inch thick and extending across the bore of said cylindrical heat insulating sheath G, which surrounds, and is spaced from said resistance members.

Between the central pair of said thin pads liv outward side faces of said resistance members; central absorbent pads positioned between and contacting with said central intermediate pads and extending parallel therewith, said central pads being spaced from each other diametrically of said cup to term a well between said central intermediate pads and between said central pads; a pair of outer pads positioned against the outer faces of said outer intermediate pads, said outer pads being grooved in their inward faces to form intermediate wells between said outer pads and said outer intermediate pads; a heat insulating cylinder surrounding said pads and spaced from said resistance members; a protective shell closely surrounding said cylinder and spaced for the major part of its length from said cup; and a screen positioned within said shell above said cylinder, pads and resistance members; said cylinder being spaced from said resistance members; said pads extending at their longitudinal edges. to the Walls of said cylinder, the outer taces ot' said outer pads being adpated to form chords for segments of said cylinder and in such manner to cooperate with said cylinder to form outward fuel wells; said shell and cylinder having intake ports formed therein communicating with the space between said shell and cup.

2. In a vaporizer', the combination of a cup open at one end, closed at the opposite end by a plug and having an intake port formed therein, said plug being recessed in its interior end; an electric binding post extending through said plug and insulated therefrom; a pair of parallel electric resistance members electrically connected at one end to said post and grounded at their opposite ends, said members being bent above one end; central intermediate thin absorbent pads positioned against the inward faces ot said resistance members; central thick absorbent pads positioned between and contacting with said central intermediate pads and extending parallel therewith, said central pads being spaced from each other parallel to said central intermediate pads to form a central well between said central intermediate pa ds and between said central pads; thin outward intermediate absorbent pads positioned against the outward faces of said resistance members; thick outward absorbent pads positioned against the outward taces ot' said outward intermediate pads, said outward pads being grooved in their inward faces to form intermediate wells between said outward pads and said outward intermediate pads; a heat insulating cylinder open at each end and surrounding said pads and resistance members and extending into the recess in said plug and spaced from said resistance members; a protective shell surrounding said cylinder and extending above the same and extending into said recess; said pads extending at their longitudinal edges to the walls of said cylinder; said central, central intermediate and outward intermediate pads extending from the upper end of said post approximately to the plane of the upper bends of said resistance members; said outward pads extending from the bottom of said recess approximately to the plane of the upper bends of said resistance members; said shell and cylinder having intake port-s formed therein, said shell being spaced from the side walls of said cup above said plug; said outward pads being adapted in part to form chords to segments of said cylinder whereby wells are formed between said outward pads and said cylinder; and a screen extending across said shell above said pads and resistance members.

A vaporizer characterized by a fuel cup, a pair of electric heating members mounted in said cup; a heat insulating sheath surrounding said members and spaced therefrom; a thin absorbent pad positioned against each side of each of said members; relatively thick absorbent pads positioned between the central two thin pads; a relatively thick absorbent pad positioned against the outer face of each of the outer thin pads, wells being formed between the central thin pads, and between the outer thin pads and the outer thick pads, and between the outer thick pads and said sheath; a protective shell surrounding said sheath and partly spaced from the sides of said cup, intake ports being formed in said shell and sheath.

4. A vaporizer comprising a fuel cup provided with an intake port; a pair of electric heating units erected in said cup; a heat insulating sheath surrounding said units and spaced therefrom, said sheath being spaced from said cup for a portion of its length; a plurality of thin incombustible absorbent pads within said sheath; a plurality of relatively thick incombustible absorbent pads within said sheath; said thin pads being in contact with said heating units and with the wall ot' said sheath; said thick pads being in contact with said thin pads and with the wall of said sheath and being spaced from said heating units; portions of some of said pads co-operating with others of said pads to form wells between them; portions of said sheath co-operating with some of said pads to form wells between them; said sheath having a fuel intake port formed therein communicating with one of said wells and with the space between said sheath and said cup, and a perforated cover for said sheath.

In testimony whereof, I hereunto alix my signature.

IRVING E. ASKE.

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